Safety effects of horizontal curve and grade combinations on rural two-lane highways

Bauer, Karin M.; Harwood, Douglas W.

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Safety effects of horizontal curve and grade combinations on rural two-lane highways

2014-01-01
By Bauer, Karin M. ; Harwood, Douglas W.

File Language:

English

Details

Creators:

Bauer, Karin M. ; Harwood, Douglas W.
Corporate Creators:

MRIGlobal (Firm)
Corporate Contributors:

United States. Federal Highway Administration. Office of Safety Research and Development
Subject/TRT Terms:
Publication/ Report Number:

FHWA-HRT-13-077
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

United States. Federal Highway Administration. Office of Safety Research and Development
Abstract:

This report summarizes the results of research undertaken to quantify the safety effects of five types of horizontal and vertical alignment combinations for rural two-lane highways. The research is based on Federal Highway Administration Highway Safety Information System data for Washington State, including crash records from 2003 to ; 2008. The outcome is a set of safety prediction models for fatal and injury and property damage only crashes. To present the results in a form suitable for incorporation in the American Association of State Highway and Transportation Officials Highway Safety Manual, crash modification factors representing safety performance relative to level tangents were developed from these models for each of the five combinations of horizontal and vertical ; alignment—horizontal curves and tangents on straight grades, horizontal curves and tangents at type 1 crest vertical curves, horizontal curves and tangents at type 1 sag vertical curves, horizontal curves and tangents at type 2 crest vertical curves, and horizontal curves and tangents at type 2 sag vertical curves.
Format:

PDF
Funding:

DTFH61-11-C-00050
Download URL:

https://rosap.ntl.bts.gov/view/dot/35716/dot_35716_DS1.pdf
File Type:

[PDF - 1.89 MB]
Collection(s):

Federal Highway Administration
Main Document Checksum:

urn:sha-512:8f9bec2d8068ff866d7ceefcdab6fb98d997654a13b299a2f220d2dc361477888c50f6776c91e883b7f0752e588facc606530d36c379117716be7f3388ffda5c

File Language:

English

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